Pregnant After Rejected by Alpha

When I woke up, I was naked and lying on a soft bed that wasn't mine, being held by a stranger whom I absolutely didn't recognize.
At the same time, there was an intense pain between my legs, I nearly screamed out loud.
Did I give my virginity to an unknown man?!
****************I am the youngest daughter of Silver Moon Pack's Alpha Aiden, and I have a twin sister. We look alike, but our destinies are completely different.
She is a female warrior and is known as the next Alpha, while I am an Omega who cannot shift into a wolf, which is considered shameful by the Pack and my father.
For 18 years, I have been guarding my virginity and waiting for my mate to appear and take me away until Blood Moon Pack Alpha's birthday, I had a one-night stand with the infamous Alpha Nicklaus, my father's enemy.
When I found out he was my mate, I was rejected. I finally decided to hide it all, I got pregnant.